<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="../vue.js/vue.js"></script>
  </head>

  <body>
    <div id="app">
      <input
        type="text"
        placeholder="按下回车提示输入"
        @keydown.up="handler"
      /><br />
    </div>

    <script>
      Vue.config.keyCodes = {
        // v: 86,
        // w: 87,
        up: [86, 87]
      };

      new Vue({
        el: "#app",
        methods: {
          handler() {
            console.log("事件触发了");
          },
        },
      });
    </script>
  </body>
</html>
